National Aeronautics and Space Administration Water Vapor Project (NVAP)

SOURCE: NASA (via CIRA, courtesy Dave Randel)

DATA DESCRIPTION: http://www.cira.colostate.edu/cira/Climate/NVAP/nvapres.htm

UPDATED THROUGH: Dec 1999

FORMAT: NetCDF

GRID: Global - 1 x 1 degree grid Global - T63 (96 x 192) grid

LEVELS: Total Column

TIMES: DAILY: 365 values per year (366 in leap years). MONTHLY: 12 values per year MONTHLY-MEAN: 12 values (climatological)

CURRENT HOLDINGS: January 1988 - Dec 1999

FIELDS:

Description Name Units Levels
Precipitable water PWAT mm total column

MSS Directories:

  • /CA/NVAP/DAILY
  • /CA/NVAP/MONTHLY
  • /CA/NVAP/MONMEAN
  • /CA/NVAP/NEW

Filenames:

  • NVAP.PWAT.daily.yy.nc (original 1 x 1 grid)
  • NVAP.PWAT.daily.T63.yy.nc
  • NVAP.PWAT.monthly.T63.yy.nc where "yy" is the 2-digit year
  • NVAP.PWAT.monmean.T63.8896.nc
  • In /NEW: NVAP.PWAT.monthly.yy.nc (original 1 x 1 grid)
  • NVAP.PWAT.monthly.T63.yy.nc for all 12 years:
  • NVAP.PWAT.monthly.88-99.nc (original 1 x 1 grid)
  • NVAP.PWAT.monthly.T63.88-99.nc

Note: These updated T63 files were generated using bilinear interpolation.


REFERENCES:

Randel, David L., Thomas J. Greenwald, Thomas H. Vonder Haar, Graeme L. Stephens, Mark A. Ringerud, Cynthia L. Combs, 1996: A New Global Water Vapor Dataset. Bulletin of the American Meteorological Society, 77, No. 6, pp. 1233-1254.

NVAP CIRA home page: www.cira.colostate.edu/climate/NVAP/NVAPCIRA.HTM